Hello! I'm having a bit of a difficulty trying to solve this exercise mostly because of the resistors. So,when short circuiting the voltage source we have the 20ohm in parallel with 40 ohm right?But what about the other resistors are they in parallel or in series with the result 20//40?The exercise tells to determine the voltage with superposition in the 40ohm resistor. And what about if we open circuit the current source?Are the 2.5 ohms and 10ohm in series with each other? What kind of process should I adopt to solve for the voltage in 40ohm resistor?Currents in equal currents out? Any help is really appreciated!